SN74AVCH8T245

AKTIV

Bus-Transceiver, 8 Bit, Doppelversorgung, mit konfigurierbarer Spannungsumsetzung und Tri-State-Ausg

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Drop-In-Ersatz mit verbesserter Funktionalität im Gegensatz zum verglichenen Baustein
SN74AXCH8T245 AKTIV Bus-Transceiver, 8 Bit, Doppelversorgung Pin-to-pin upgrade with a wider voltage range and improved performance

Produktdetails

Technology family AVC Bits (#) 8 High input voltage (min) (V) 1.2 High input voltage (max) (V) 3.6 Vout (min) (V) 1.2 Vout (max) (V) 3.6 Data rate (max) (Mbps) 380 IOH (max) (mA) -12 IOL (max) (mA) 12 Supply current (max) (µA) 16 Features Bus-hold, Overvoltage tolerant inputs, Partial power down (Ioff) Input type Standard CMOS Output type 3-State, Balanced CMOS, Push-Pull Rating Catalog Operating temperature range (°C) -40 to 85
Technology family AVC Bits (#) 8 High input voltage (min) (V) 1.2 High input voltage (max) (V) 3.6 Vout (min) (V) 1.2 Vout (max) (V) 3.6 Data rate (max) (Mbps) 380 IOH (max) (mA) -12 IOL (max) (mA) 12 Supply current (max) (µA) 16 Features Bus-hold, Overvoltage tolerant inputs, Partial power down (Ioff) Input type Standard CMOS Output type 3-State, Balanced CMOS, Push-Pull Rating Catalog Operating temperature range (°C) -40 to 85
TSSOP (PW) 24 49.92 mm² 7.8 x 6.4 TVSOP (DGV) 24 32 mm² 5 x 6.4 VQFN (RHL) 24 19.25 mm² 5.5 x 3.5
  • Control inputs (DIR and OE) VIH and VIL levels are referenced to VCCA voltage
  • Bus hold on data inputs eliminates the need for external pullup or pulldown resistors
  • VCC isolation feature
  • Fully configurable dual-rail design
  • I/Os are 4.6-V tolerant
  • Ioff supports partial-power-down mode operation
  • Maximum data rates:
    • 320Mbps (VCCA ≥ 1.8V and VCCB ≥ 1.8V)
    • 170Mbps (VCCA ≤ 1.8V or VCCB ≤ 1.8V)
  • Latch-up performance exceeds 100mA per JESD 78, class II
  • ESD protection exceeds JESD 22:
    • 8000-V Human-Body Model (A114-A)
    • 200-V Machine Model (A115-A)
    • 1000-V Charged-Device Model (C101)
  • Control inputs (DIR and OE) VIH and VIL levels are referenced to VCCA voltage
  • Bus hold on data inputs eliminates the need for external pullup or pulldown resistors
  • VCC isolation feature
  • Fully configurable dual-rail design
  • I/Os are 4.6-V tolerant
  • Ioff supports partial-power-down mode operation
  • Maximum data rates:
    • 320Mbps (VCCA ≥ 1.8V and VCCB ≥ 1.8V)
    • 170Mbps (VCCA ≤ 1.8V or VCCB ≤ 1.8V)
  • Latch-up performance exceeds 100mA per JESD 78, class II
  • ESD protection exceeds JESD 22:
    • 8000-V Human-Body Model (A114-A)
    • 200-V Machine Model (A115-A)
    • 1000-V Charged-Device Model (C101)

The SN74AVCH8T245 is an 8-bit noninverting bus transceiver that uses two separate configurable power-supply rails. The A port is designed to track VCCA, which accepts any supply voltage from 1.2V to 3.6V. The B port is designed to track VCCB, which also accepts any supply voltage from 1.2V to 3.6V. This allows for universal low-voltage bidirectional translation between any of the 1.2-V, 1.5-V, 1.8-V, 2.5-V, and 3.3-V voltage nodes.

The SN74AVCH8T245 is designed for asynchronous communication between data buses. The device transmits data from either the A bus to the B bus, or from the B bus to the A bus, depending on the logic level at the direction-control (DIR) input. The output-enable (OE) input can be used to disable the outputs so the buses are effectively isolated.

The design of SN74AVCH8T245 references the control pins (DIR and OE) to VCCA.

Active bus-hold circuitry holds unused or undriven inputs at a valid logic state. It is not recommended to use pullup or pulldown resistors with the bus-hold circuitry.

This device is fully specified for partial-power-down applications using Ioff. The Ioff circuitry disables the outputs, preventing damaging current backflow through the device.

The VCC isolation feature allows the outputs to be in the high-impedance state when either VCCA or VCCB is at GND. The bus-hold circuitry on the powered-up side always stays active.

The SN74AVCH8T245 solution is compatible with a single-supply system and can be replaced later with a ’245 function, with minimal printed circuit board redesign.

To put the device in the high-impedance state during power up or power down, OE must be tied to VCCA through a pullup resistor; the current-sinking capability of the driver determines the minimum value of the resistor.

The SN74AVCH8T245 is an 8-bit noninverting bus transceiver that uses two separate configurable power-supply rails. The A port is designed to track VCCA, which accepts any supply voltage from 1.2V to 3.6V. The B port is designed to track VCCB, which also accepts any supply voltage from 1.2V to 3.6V. This allows for universal low-voltage bidirectional translation between any of the 1.2-V, 1.5-V, 1.8-V, 2.5-V, and 3.3-V voltage nodes.

The SN74AVCH8T245 is designed for asynchronous communication between data buses. The device transmits data from either the A bus to the B bus, or from the B bus to the A bus, depending on the logic level at the direction-control (DIR) input. The output-enable (OE) input can be used to disable the outputs so the buses are effectively isolated.

The design of SN74AVCH8T245 references the control pins (DIR and OE) to VCCA.

Active bus-hold circuitry holds unused or undriven inputs at a valid logic state. It is not recommended to use pullup or pulldown resistors with the bus-hold circuitry.

This device is fully specified for partial-power-down applications using Ioff. The Ioff circuitry disables the outputs, preventing damaging current backflow through the device.

The VCC isolation feature allows the outputs to be in the high-impedance state when either VCCA or VCCB is at GND. The bus-hold circuitry on the powered-up side always stays active.

The SN74AVCH8T245 solution is compatible with a single-supply system and can be replaced later with a ’245 function, with minimal printed circuit board redesign.

To put the device in the high-impedance state during power up or power down, OE must be tied to VCCA through a pullup resistor; the current-sinking capability of the driver determines the minimum value of the resistor.

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Technische Dokumentation

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Typ Titel Datum
* Data sheet SN74AVCH8T245 8-Bit Dual-Supply Bus Transceiver With Configurable Level-Shifting, Voltage Translation, and 3-State Outputs datasheet (Rev. J) PDF | HTML 12 Apr 2024
Application note Schematic Checklist - A Guide to Designing with Auto-Bidirectional Translators PDF | HTML 12 Jul 2024
Application note Understanding Transient Drive Strength vs. DC Drive Strength in Level-Shifters (Rev. A) PDF | HTML 03 Jul 2024
Selection guide Voltage Translation Buying Guide (Rev. A) 15 Apr 2021
Selection guide Logic Guide (Rev. AB) 12 Jun 2017
Application note Understanding and Interpreting Standard-Logic Data Sheets (Rev. C) 02 Dez 2015
Application note Voltage Translation Between 3.3-V, 2.5-V, 1.8-V, and 1.5-V Logic Standards (Rev. B) 30 Apr 2015
User guide LOGIC Pocket Data Book (Rev. B) 16 Jan 2007
Application note Semiconductor Packing Material Electrostatic Discharge (ESD) Protection 08 Jul 2004
Application note Selecting the Right Level Translation Solution (Rev. A) 22 Jun 2004
More literature LCD Module Interface Application Clip 09 Mai 2003
User guide AVC Advanced Very-Low-Voltage CMOS Logic Data Book, March 2000 (Rev. C) 20 Aug 2002
More literature Standard Linear & Logic for PCs, Servers & Motherboards 13 Jun 2002
Application note 16-Bit Widebus Logic Families in 56-Ball, 0.65-mm Pitch Very Thin Fine-Pitch BGA (Rev. B) 22 Mai 2002
Application note Dynamic Output Control (DOC) Circuitry Technology And Applications (Rev. B) 07 Jul 1999
Application note AVC Logic Family Technology and Applications (Rev. A) 26 Aug 1998

Design und Entwicklung

Weitere Bedingungen oder erforderliche Ressourcen enthält gegebenenfalls die Detailseite, die Sie durch Klicken auf einen der unten stehenden Titel erreichen.

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Benutzerhandbuch: PDF
Simulationsmodell

SN74AVCH8T245 IBIS Model

SCEM426.ZIP (68 KB) - IBIS Model
Gehäuse Pins CAD-Symbole, Footprints und 3D-Modelle
TSSOP (PW) 24 Ultra Librarian
TVSOP (DGV) 24 Ultra Librarian
VQFN (RHL) 24 Ultra Librarian

Bestellen & Qualität

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